Preventing ignition

[sfkjeld]

Can someone tell me if there is a fuse that controls ignition for a 2000 2.7 car? I’d like to be able to spin the motor with the starter but prevent the engine from actually starting.

[JFP in PA]

Originally Posted by sfkjeld

Can someone tell me if there is a fuse that controls ignition for a 2000 2.7 car? I’d like to be able to spin the motor with the starter but prevent the engine from actually starting.

Take either the fuse or relay for the fuel pump, bleed off residual fuel pressure and it won't be able to start.

[sfkjeld]

Thanks, but it sounds messy. Is there a fuse in the ignition circuit?

[blue62]

Originally Posted by sfkjeld

Thanks, but it sounds messy. Is there a fuse in the ignition circuit?

There is a "presta" valve on the fuel rail, It's like a valve on your tires.
push it with a screw driver while holding a rag over it.... done.
JFP gave you sound advice..... if you crank the engine over without disabling the fuel system and relieving the fuel pressure your going to be putting raw fuel into the engine....... washing the oil off the cylinders and bearings...... Not good for the engine.......
Then pumping raw fuel into the exhaust and possibly damaging the catalytic converters.
If you want to know the location or type of specific fuses or relays they are listed in the Bentley book.
I believe fuel injectors and ignition are the same fuse.

[sfkjeld]

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

[blue62]

Originally Posted by sfkjeld

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

well I have no idea what it is your trying to do so I couldn't say.

[JFP in PA]

Originally Posted by sfkjeld

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

Because if you just remove the fuse, you will be still pumping gas into the engine while it is turning over, which is not a good idea; if you disable the fuel system and vent off the residual pressure, you will prevent gas washing over the cylinder walls and into the oil sump, which is a primary cause of bore scoring.

[sfkjeld]

Thank you. I hadn’t thought of that. Where is the “presta valve” and the fuel rail? And once I’ve pressed the valve, do I need to do anything to re-enable the fuel supply?

[blue62]

Originally Posted by sfkjeld

Thank you. I hadn’t thought of that. Where is the “presta valve” and the fuel rail? And once I’ve pressed the valve, do I need to do anything to re-enable the fuel supply?

Look at the engine the fuel rail feeds the fuel injectors. If you know anything about engines you can't miss it. The presta valve is in the fuel rail it typically has a brass cap or plug over it.
When you replace the fuel pump relay or fuse and go to restart the engine for the first time just turn the key to the on position a wait a few seconds and give the fuel pump a chance to re-pressurize the system before engaging the starter.

[sfkjeld]

Wait, that’s a bit harsh, no? I said I want to turn the engine over with the starter, without the car starting. It’s been in storage for months. I want the oil to circulate just a bit before the car starts.

Yes, I was hoping there was a way to cut the ignition only. I get the issue Blue brought up, with raw fuel dumping into the cylinders. Tho in this case, I doubt it will matter since the engine won’t need to spin much. And I would only need it after its winter storage.

I appreciate your help. But not necessarily your tone.

[blue62]

Originally Posted by sfkjeld

Wait, that’s a bit harsh, no? I said I want to turn the engine over with the starter, without the car starting. It’s been in storage for months. I want the oil to circulate just a bit before the car starts.

Yes, I was hoping there was a way to cut the ignition only. I get the issue Blue brought up, with raw fuel dumping into the cylinders. Tho in this case, I doubt it will matter since the engine won’t need to spin much. And I would only need it after its winter storage.

I appreciate your help. But not necessarily your tone.

You would be doing more damage with the raw fuel issue then any wear you would deminish by spinning the engine to circulate the oil before starting.
If you truly feel the need to circulate oil before starting after winter lay up then you should consider installing something like an acu sump system they are designed for that purpose.